National Stock Number
4240-00-640-5521
National Stock Number (NSN) 4240-00-640-5521, or NIIN 006405521, (spectacles,industrial) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 02, 1991, this NSN's acquisition method was noted as: Not established. Not established.
This NSN is assigned to Item Name Code (INC) 13687. [SPECTACLES DESIGNED FOR PROTECTION AGAINST IMPACT AND/OR LIGHT RADIATION. IT MAY INCLUDE PRESCRIPTION LENSES.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 4240006405521 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.